An international monitoring group has declared that last year's election in Fiji was "credible", but has called for restrictions on the media and civil society groups to be eased.

The September 2014 vote was the first election in the coup-plagued Pacific nation since military strongman Frank Bainimarama seized power in 2006.

The Multinational Observer Group (MOG) said it was satisfied the poll, which resulted in a landslide victory for Mr Bainimarama's FijiFirst party, was carried out correctly.

"While the MOG notes areas for improvement of Fiji's electoral process, it deems this a credible election," said the group, which collates observations from 92 members in 13 countries around the world, as well as the European Union, in its final report.

"The MOG believes the election broadly represented the will of the Fijian voters.

"The MOG congratulates the people of Fiji on taking this important step in their return to democracy."

However, the Multinational Observer Group criticised the threat of draconian punishments for media deemed to have broken Fiji's restrictive media laws, or breached a three-day blackout on election reporting in the lead-up to polling day.

Under the laws, journalists risked a five-year term for publishing political analysis, interviews with candidates, or anything that had the potential to influence voters during the blackout period.

"The restrictive and vague media framework, including potentially harsh penalties, limited the media's ability to rigorously examine the claims of candidates and parties," it said.

Another concern raised by the group was a ban on non-government organisations participating in the election process by holding debates, publishing voter information, or acting as polling booth observers.

It said the ban, which threatened NGO members with 10-year jail terms, was "unduly restrictive".

"Heavy restrictions were placed on civil society participation in the lead-up to the election," it said, calling for an overhaul of the laws before the next election, scheduled for 2018.

More than 500,000 people were registered to vote in the 2014 election which, for the first time, extended full voting rights to Indian Fijians who make up 40 per cent of the 900,000 population.

The vote was considered pivotal to ending the country's "coup culture" which saw four governments toppled between 1987 and 2006, largely due to tensions between indigenous Fijians and ethnic Indians.

After the election, the US, Britain and Australia lifted sanctions and Fiji was allowed to rejoin the Commonwealth.

However, opposition politicians claimed ballot-rigging had marred the result.